Yoongi has been careful so far. Whatever his own instinctive desires, he hasn't yet left a mark that didn't fade moments after he made it. Anything around Jungkook's neck might call attention they don't want from people who don't deserve any piece of this. The only thing about these moments that can linger are the memories.

But a collarbone can be hidden, especially in winter.

Yoongi whines into his skin, heat and pressure gathering along his spine at the deft pull of fingers in his hair, at the thought of marking Jungkook. He sucks a little harder, tongue smoothing over the spot soothingly afterward, teeth skating over sensitive skin a moment later. "Want. Want to mark you," he admits. If Jungkook wants him on his skin, then Yoongi wants to give him that. He works at his skin, hips rocking back against Jungkook's in answer, until he draws back enough to look and see the pink and purple blossoming along the jut of his collarbone. That, he thinks, is better. If there are going to be bruises, he wants them to be the ones he's left out of love.

And if Jungkook wants Yoongi to go down on him in the classroom, he can do that, too. The others never have to know.

He presses the pad of his thumb gently against the spot, lifting his head to kiss Jungkook again. "Wanna make you mine."